Feeding socket and illumination device

Abstract

To improve the electrical connection between a feeding terminal and a conducting part.SOLUTION: A feeding socket 300 comprises a first insertion part 320, a conducting part 330, and a guide part 340. The first insertion part 320 has a first insertion hole 321 into which a feeding terminal 120 is inserted. The conducting part 330 is electrically connected to the feeding terminal 120. The guide part 340 guides the feeding terminal 120 during connection operations. The guide part 340 has a guide hole 341 and a fall-off regulation part 343. The guide hole 341 is connected with the first insertion hole 321 and guides the feeding terminal 120 from the first insertion part 320 to the conducting part 330. The fall-off regulation part 343 regulates fall-off of the feeding terminal 120. The fall-off regulation part 343 is provided between the first insertion hole 321 and the conducting part 330 in a movement direction during the connection operations.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a power supply socket and a lighting device, and more particularly to a power supply socket that supplies power to a light source unit and a lighting device that includes the power supply socket. [Background technology]

[0002] Conventionally, lighting devices configured by mounting a lamp unit in a socket have been known. For example, Patent Document 1 discloses a socket in which a power supply terminal pin provided on the lamp unit is sandwiched between a pair of terminal portions at the end of a pin groove provided on the socket, thereby simultaneously supporting and electrically connecting the lamp unit to the socket. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 005244 Summary of the Invention [Problem to be solved by the invention]

[0004] In the socket (power supply socket) described in Patent Document 1, the pair of terminal portions (conductive portions) are conductive, so even before the power supply terminal pin (power supply terminal) is held by the pair of terminal portions at the end of the pin groove, the power supply terminal pin may come into contact with the pair of terminal portions, causing the lamp unit to light up. As a result, the power supply terminal pin may be used without being held by the pair of terminal portions at the end of the pin groove, which may weaken the electrical connection between the power supply terminal pin and the pair of terminal portions.

[0005] The present disclosure aims to provide a power supply socket and a lighting device that can improve the electrical connection between the power supply terminal and the conductive portion. [Means for solving the problem]

[0006] A power feed socket according to one aspect of the present disclosure is a power feed socket that feeds power to a light source unit that includes a power feed terminal. The power feed socket includes an insertion portion, a conductive portion, and a guide portion. The insertion portion has an insertion hole into which the power feed terminal is inserted. The conductive portion is electrically connected to the power feed terminal. The guide portion guides the power feed terminal during a connection operation to electrically connect the power feed terminal to the conductive portion. The guide portion includes a guide hole and a fall-off prevention portion. The guide hole is connected to the insertion hole and guides the power feed terminal from the insertion portion to the conductive portion. The fall-off prevention portion prevents the power feed terminal from falling off. The fall-off prevention portion is provided between the insertion hole and the conductive portion in a movement direction in which the power feed terminal moves during the connection operation.

[0007] An illumination device according to one aspect of the present disclosure includes the power feed socket and the light source unit detachably attached to the power feed socket. [Effects of the Invention]

[0008] According to the power feed socket and lighting device according to the above aspect, the electrical connection between the power feed terminal and the conductive portion can be improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a lighting device according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the lighting device. [Figure 3] FIG. 3 is a perspective view of a light source unit in the lighting device. [Figure 4] FIG. 4 is a front view of the power supply socket in the lighting device. [Figure 5] FIG. 5 is a rear view of the power supply socket in the lighting device. [Figure 6] FIG. 6 is a cross-sectional view of a power supply socket in the lighting device. [Figure 7]FIG. 7 is a cross-sectional view of a power supply socket in a lighting device according to a first modification of the embodiment. [Figure 8] FIG. 8 is a cross-sectional view of a power supply socket in a lighting device according to a second modification of the embodiment. [Figure 9] FIG. 9 is a cross-sectional view of a power supply socket in a lighting device according to another modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] A power socket and a lighting device according to embodiments of the present disclosure will be described below with reference to the drawings. Each of the embodiments described below represents a preferred specific example of the present disclosure. Therefore, the numerical values, materials, components, component arrangements, connection configurations, processes, and process sequences shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, any components in the following embodiments that are not recited in the independent claims that represent the overall concept of the present disclosure will be described as optional components. The drawings referenced in the following embodiments are schematic and are not necessarily rigorous illustrations. In other words, the size and thickness ratios of each component in the drawings do not necessarily reflect the actual dimensional ratios.

[0011] (1) Description of the embodiment Hereinafter, a lighting device 1 according to an embodiment of the present disclosure will be described. Fig. 1 is a perspective view of the lighting device 1 according to the embodiment. Fig. 2 is a cross-sectional view of the lighting device 1 according to the embodiment. The lighting device 1 is, for example, a downlight that is recessed into the ceiling of a house or the like and emits light downward, but is not limited to a downlight and may be, for example, a spotlight.

[0012] 1 and 2, the lighting device 1 includes a light source unit 10 and a fixture body 20. The lighting device 1 also includes a terminal block 30 and a pair of mounting springs 40. The fixture body 20 has an attachment member 210, a cover member 220, and a power feed socket 300. That is, the lighting device 1 includes the power feed socket 300 and the light source unit 10 that is detachably attached to the power feed socket 300. Each component of the lighting device 1 will be described in detail below.

[0013] In the following description, the front-rear, left-right, and up-down directions indicated by arrows in Fig. 1 are defined as the front-rear, left-right, and up-down directions of the lighting device 1 and its components. However, these directions are not intended to limit the directions of the lighting device 1 and its components when in use. Furthermore, the arrows indicating "front," "rear," "left," "right," "up," and "down" in Fig. 1 are merely shown for the purpose of explanation and do not have any physical substance.

[0014] (1.1) Light source unit FIG. 3 is a perspective view of the light source unit 10 in the lighting device 1 according to the embodiment. As shown in FIG. 3, the light source unit 10 has a main body 110, a plurality of (two in the illustrated example) power supply terminals 120, a protrusion 130, and a light source (not shown). The light source has, for example, one or more LEDs (Light Emitting Diodes). As shown in FIG. 2, the light source unit 10 is detachably attached to a power supply socket 300. External commercial power is input to the power supply socket 300 via a power cable. The power input to the power supply socket 300 is supplied to the light source unit 10.

[0015] The main body 110 is formed in a cylindrical shape with its axis extending in the vertical direction. The main body 110 has a base surface 111. The base surface 111 is the upper surface of the main body 110 and has a circular shape when viewed from above. As will be described later, a plurality of power supply terminals 120 and protrusions 130 are provided on the base surface 111.

[0016] 3, each of the multiple power supply terminals 120 is provided to extend upward from the base surface 111 of the main body 110. Each power supply terminal 120 is a terminal that receives power from outside the light source unit 10 to cause the light source section of the light source unit 10 to emit light. Each power supply terminal 120 receives power from the power supply socket 300 when the light source unit 10 is attached to the power supply socket 300.

[0017] Each power supply terminal 120 has a small diameter portion 121 and a large diameter portion 122. The small diameter portion 121 is a round bar-shaped portion that extends upward from the base surface 111 of the main body 110. The large diameter portion 122 is a disk-shaped portion that extends upward from the tip (upper end) of the small diameter portion 121. In a plan view from above, the diameter D2 (see FIG. 6) of the large diameter portion 122 is larger than the diameter D1 (see FIG. 6) of the small diameter portion 121. The light source unit 10 is attached to the power supply socket 300 by inserting the large diameter portion 122 of each power supply terminal 120 into a first insertion hole 321 of the power supply socket 300, which will be described later, and rotating the light source unit 10 by a predetermined angle.

[0018] As shown in FIG. 3, the protrusion 130 is provided so as to extend upward from the center of the base surface 111 of the main body 110. The protrusion 130 is inserted into a second insertion hole 351 (see FIG. 4) of the power supply socket 300, which will be described later. The protrusion 130 is formed in a cylindrical shape with its axial direction extending in the vertical direction. The protrusion 130 forms an accommodating space that accommodates, for example, a capacitor or the like, which is a circuit element of the light source unit 10. The protrusion 130 has a pair of protrusions 131. The pair of protrusions 131 are provided at positions that are point-symmetric with the center of the protrusion 130 as the center of symmetry.

[0019] The two power supply terminals 120 are provided at positions that are point-symmetrical with respect to the center of the protrusion 130 that is located at the center of the base surface 111 of the main body 110. This enables the power supply socket 300 to hold the light source unit 10 evenly.

[0020] (1.2) Device body 1 and 2, the fixture body 20 has an attachment member 210, a cover member 220, and a power supply socket 300. Each component of the fixture body 20 will be described in detail below.

[0021] (1.2.1) Mounting parts 1 and 2, the mounting member 210 is a member that is attached to the bottom and side surfaces of the cover member 220. A terminal block 30 is attached to the mounting member 210. The terminal block 30 supplies power from an external power source to the power feed socket 300.

[0022] (1.2.2) Cover member As shown in FIG. 2, the cover member 220 is a cover that covers the light source unit 10 and the like. The cover member 220 is formed in a cylindrical shape with a bottom and an open bottom. The cover member 220 functions as a mounting member to which the light source unit 10 is attached, and also functions as a heat sink (heat dissipation member) that dissipates heat generated by the light source unit 10. The cover member 220 is made of a material with high thermal conductivity, such as aluminum. The cover member 220 may also be made of an insulating resin with high thermal conductivity. This allows the cover member 220 to be lightweight while improving its insulating properties.

[0023] (1.2.3) Power socket Fig. 4 is a front view of the power feed socket 300 in the lighting device 1 according to the embodiment. Fig. 5 is a rear view of the power feed socket 300 in the lighting device 1 according to the embodiment. The power feed socket 300 is a power feed socket for feeding power to the light source unit 10 including the power feed terminal 120. As shown in Figs. 4 and 5, the power feed socket 300 includes a socket body 310 and a plurality of (two in the illustrated example) conductive parts 330.

[0024] (1.2.3.1) Socket body As shown in FIGS. 4 and 5, the socket body 310 is an outer casing of the power feeding socket 300 and is a cylindrical member large enough to accommodate multiple conductive portions 330. The socket body 310 is formed, for example, from an insulating resin material. The socket body 310 includes a main portion 311 that forms the top surface of the power feeding socket 300. The main portion 311 has an annular shape when viewed from above and below. The socket body 310 has multiple (two in the illustrated example) first insertion portions 320, multiple (two in the illustrated example) guide portions 340, and a second insertion portion 350.

[0025] Each of the multiple first insertion portions 320 has a first insertion hole 321. The first insertion hole 321 penetrates the main portion 311 of the socket body 310 in the up-down direction. The first insertion hole 321 has a circular shape in a plan view from the up-down direction. An opening length L1 of the first insertion hole 321 is longer than a diameter D2 (see FIG. 6 ) of the large diameter portion 122 of the power feeding terminal 120 of the light source unit 10. Therefore, the large diameter portion 122 of the power feeding terminal 120 can be inserted into the socket body 310 through the first insertion hole 321. In other words, the first insertion hole 321 has a size that allows the power feeding terminal 120 to be inserted therein. In this embodiment, the opening length L1 of the first insertion hole 321 is the diameter of the first insertion hole 321. In addition, in this embodiment, the first insertion portion 320 corresponds to an insertion portion, and the first insertion hole 321 corresponds to an insertion hole. That is, the power supply socket 300 includes a first insertion portion 320 having a first insertion hole 321 into which the power supply terminal 120 is inserted.

[0026] Each of the guide portions 340 has a guide hole 341. Each guide hole 341 penetrates the main portion 311 of the socket body 310 in the vertical direction. The multiple first insertion holes 321 and the multiple guide holes 341 correspond one-to-one to each other. Each guide hole 341 has an arc shape in a plan view from the vertical direction and is connected to a corresponding one of the multiple first insertion holes 321. In a plan view from the vertical direction, each guide hole 341 extends in an arc shape clockwise from the corresponding first insertion hole 321, with the center C1 of the socket body 310 as the center of symmetry. This allows the power supply terminal 120 to be inserted into the guide hole 341 by rotating the light source unit 10. Furthermore, the opening length L2 of each guide hole 341 in the intersecting direction is shorter than the opening length L1 of the corresponding first insertion hole 321 in the intersecting direction. Furthermore, the opening length L2 of each guide hole 341 is larger than the diameter D1 (see FIG. 6) of the small diameter portion 121 of the power supply terminal 120 and smaller than the diameter D2 (see FIG. 6) of the large diameter portion 122. As a result, during the connection work of electrically connecting the power supply terminal 120 to the conductive portion 330, the large diameter portion 122 of the power supply terminal 120 catches on the edge of the guide hole 341, making it less likely that the power supply terminal 120 will come off the power supply socket 300 and cause the light source unit 10 to fall.

[0027] Each guide hole 341 has the function of guiding the power supply terminal 120, which is inserted through the first insertion hole 321 of the first insertion portion 320, from the first insertion portion 320 to the conductive portion 330. That is, each guide portion 340 guides the power supply terminal 120 during the connection process of electrically connecting the power supply terminal 120 to the conductive portion 330. In short, the power supply socket 300 includes guide portions 340 that guide the power supply terminal 120 during the connection process.

[0028] As shown in FIG. 6, each of the guide portions 340 further includes a drop-off prevention portion 343, a retention portion 344, and a connection portion 345.

[0029] The fall-off prevention portion 343 has a function of preventing the power supply terminal 120 from falling off. As shown in FIG. 6 , the fall-off prevention portion 343 is provided near the first insertion hole 321. More specifically, the fall-off prevention portion 343 is provided between the first insertion hole 321 and the retaining portion 344 in the movement direction, which is the direction in which the power supply terminal 120 moves during the connection work. The fall-off prevention portion 343 includes a wall 3431. The wall 3431 is provided along the insertion direction so as to surround the first insertion hole 321. The insertion direction is the direction in which the power supply terminal 120 is inserted into the first insertion hole 321, which is the up-down direction in this embodiment. More specifically, the wall 3431 is cylindrical with a C-shaped cross section. That is, the fall-off prevention portion 343 is formed so as to have a step between the first insertion hole 321 and the retaining portion 344. In this manner, forming the first insertion portion 320 having the first insertion hole 321 and the fall-off prevention portion 343 integrally leads to a reduction in the number of parts. Furthermore, because the wall 3431 is provided so that the fall-off prevention portion 343 has a step, the large diameter portion 122 of the power feed terminal 120 abuts against the fall-off prevention portion 343 (wall 3431) before falling off from the first insertion hole 321. Therefore, it is possible to prevent the power feed terminal 120 from falling off from the first insertion hole 321. Furthermore, in order for the large diameter portion 122 of the power feed terminal 120 to pass through the fall-off prevention portion 343, it needs to move downward (against gravity). Therefore, it is difficult for the large diameter portion 122 of the power feed terminal 120 to reach the first insertion portion 320, and therefore the light source unit 10 is less likely to fall off from the power feed socket 300.

[0030] 6, the height H1 of the wall 3431 of the fall-off prevention portion 343 is preferably large enough to prevent the large diameter portion 122 of the power feeding terminal 120 from passing through due to an external factor such as vibration. For example, the height H1 of the wall 3431 of the fall-off prevention portion 343 is equal to or larger than half the height H2 of the large diameter portion 122. On the other hand, if the height H1 of the wall 3431 of the fall-off prevention portion 343 is too large, it becomes difficult to attach and detach the light source unit 10 to and from the power feeding socket 300. Therefore, the height H1 of the wall 3431 of the fall-off prevention portion 343 is preferably large enough to allow the light source unit 10 to be easily attached and detached to and from the power feeding socket 300.

[0031] The retaining portion 344 is provided between the fall-off prevention portion 343 and the conductive portion 330 in the movement direction, which is the direction in which the power supply terminal 120 moves during the connection work. Specifically, as shown in FIG. 6 , the retaining portion 344 is provided on the periphery of the guide hole 341 between the fall-off prevention portion 343 and the conductive portion 330. In this embodiment, the retaining portion 344 is a flat surface located between the fall-off prevention portion 343 and the connection portion 345. That is, the retaining portion 344 has at least a portion that is parallel to the surface of the main portion 311 of the socket body 310. The retaining portion 344 is provided on the fall-off prevention portion 343 side with respect to the connection portion 345. When attaching or detaching the light source unit 10, the large diameter portion 122 of the power supply terminal 120 passes through or comes into contact with the retaining portion 344.

[0032] Here, the retaining portion 344 is located lower than the tip (upper end) of the wall 3431 of the falling-off prevention portion 343. Specifically, the retaining portion 344 is located lower than the tip of the wall 3431 of the falling-off prevention portion 343. When the light source unit 10 rotates in the direction opposite to the mounting direction due to an external factor such as vibration, the large diameter portion 122 of the power supply terminal 120 reaches the retaining portion 344.

[0033] The connection portion 345 is, for example, the terminal end portion of the guide hole 341. The connection portion 345 is a flat surface of the guide portion 340 that is connected to the retaining portion 344. When the large diameter portion 122 of the power supply terminal 120 passes the retaining portion 344 and reaches the connection portion 345, the power supply terminal 120 and the conductive portion 330 are electrically connected.

[0034] As shown in FIG. 4 , the second insertion portion 350 has a second insertion hole 351 and a pair of grooves 352. The second insertion hole 351 penetrates the socket body 310 in the up-down direction near the center of the socket body 310. The second insertion hole 351 has a circular shape when viewed from above. That is, the socket body 310 has an annular (donut-like) shape when viewed from above. As described above, the protrusion 130 of the light source unit 10 is inserted into the second insertion hole 351 of the second insertion portion 350. Therefore, the inner diameter of the second insertion hole 351 is larger than the outer diameter of the protrusion 130. Furthermore, it is desirable that the height of the second insertion portion 350 is larger than the height of the protrusion 130. The pair of grooves 352 are provided at positions point-symmetrical with respect to the center of the second insertion hole 351. A corresponding one of the multiple protrusions 131 provided on the protrusion 130 is inserted into each of the pair of grooves 352.

[0035] As shown in Fig. 4, the two first insertion portions 320 are provided in the main portion 311 of the socket body 310 at positions that are point-symmetrical with respect to the center C1 of the socket body 310. Also, as shown in Fig. 4, the two guide portions 340 are provided in the main portion 311 of the socket body 310 at positions that are point-symmetrical with respect to the center C1 of the socket body 310. This ensures that the support points of the light source units 10 in the power feeding socket 300 are evenly distributed, allowing the power feeding socket 300 to hold the light source units 10 evenly.

[0036] (1.2.3.2) Conductive parts 5, each of the plurality of conductive portions 330 is an elastic plate-like member. Each conductive portion 330 is arranged along a corresponding one of the plurality of guide holes 341 so as to cover the corresponding guide hole 341. Specifically, each conductive portion 330 overlaps a part of the corresponding guide hole 341 in a plan view from the top and bottom direction. Each conductive portion 330 is electrically connected by contacting a corresponding one of the plurality of power supply terminals 120.

[0037] 6 is a cross-sectional view of the power feed socket 300 in the lighting device 1 according to the embodiment. As shown in FIG. 6, each conductive portion 330 has a bent portion 331. The bent portion 331 in each conductive portion 330 protrudes downward in a V-shape. In the lighting device 1 according to the embodiment, the bent portion 331 in each conductive portion 330 of the power feed socket 300 makes line contact in the vertical direction with the large diameter portion 122 of the corresponding power feed terminal 120 of the light source unit 10, thereby supplying power from each conductive portion 330 to the corresponding power feed terminal 120. When the large diameter portion 122 of the corresponding power feed terminal 120 reaches the connection portion 345, each conductive portion 330 becomes electrically connectable to the large diameter portion 122.

[0038] (1.3) Overall structure Next, the overall configuration of the lighting device 1 configured as above will be described in detail.

[0039] 1 and 2, the light source unit 10 is inserted into the power feed socket 300 from below and electrically connected to the power feed socket 300. At this time, the protrusion 130 of the light source unit 10 is inserted into the second insertion portion 350 of the power feed socket 300. At this time, the power feed terminal 120 of the light source unit 10 is inserted into the first insertion portion 320 of the power feed socket 300 and moves along the guide portion 340 to a position where it contacts the conductive portion 330. The cover member 220 covers the periphery of the power feed socket 300 and the light source unit 10. The attachment member 210 covers the side and bottom surfaces of the cover member 220. In this embodiment, the diameter of the light source unit 10 is approximately the same as the diameter of the power feed socket 300.

[0040] (1.4) How to install the light source unit Next, a detailed description will be given of a method for attaching the light source unit 10 to the power feed socket 300 configured as described above. The attachment method according to this embodiment includes an insertion step, a rotation step, and a connection step. The insertion step is a step of inserting the power feed terminal 120 of the light source unit 10 into the first insertion portion 320 of the power feed socket 300. The rotation step is a step of rotating the light source unit 10 relative to the power feed socket 300. The connection step is a step of connecting the power feed terminal 120 of the light source unit 10 to the conductive portion 330 of the power feed socket 300.

[0041] (1.4.1) Insertion process First, the protrusion 130 of the light source unit 10 is inserted into the second insertion hole 351 of the second insertion portion 350 of the power feed socket 300. At the same time, the power feed terminal 120 of the light source unit 10 is inserted into the first insertion hole 321 of the first insertion portion 320 of the power feed socket 300.

[0042] (1.4.2) Rotation process Next, in a plan view from below, the light source unit 10 is rotated clockwise with respect to the power feeding socket 300. As a result, the power feeding terminal 120 moves from the first insertion hole 321 of the first insertion portion 320 to the guide hole 341 of the guide portion 340. At this time, the large diameter portion 122 of the power feeding terminal 120 is inserted until it exceeds (the wall 3431 of) the fall-off prevention portion 343, and passes through the fall-off prevention portion 343. After passing through the fall-off prevention portion 343, the large diameter portion 122 of the power feeding terminal 120 reaches the retention portion 344. After reaching the retention portion 344, the large diameter portion 122 of the power feeding terminal 120 moves along the guide hole 341 to reach the connection portion 345.

[0043] (1.4.3) Connection process Through the above-described rotation process, the power supply terminal 120 reaches the connection portion 345 of the guide portion 340, which is electrically connectable to the conductive portion 330. By contacting the conductive portion 330, the power supply terminal 120 is able to supply power to the light source unit 10, and the power supply terminal 120 is held in the power feed socket 300. Specifically, the large diameter portion 122 of the power supply terminal 120 is in line contact with the bent portion 331 of the conductive portion 330, and is thereby sandwiched (held) between the conductive portion 330 and the connection portion 345.

[0044] (1.5) Function of the Fall-Off Prevention Unit Next, the function of the fall-off prevention section 343 of the power supply socket 300 configured as above will be described in detail.

[0045] The fall-off prevention portion 343 is formed so as to have a step between the first insertion hole 321 and the retaining portion 344. The retaining portion 344 is located lower than the tip (upper end) of the wall 3431 of the fall-off prevention portion 343. Therefore, when the large diameter portion 122 of the power feed terminal 120 is positioned in the retaining portion 344, the large diameter portion 122 of the power feed terminal 120 abuts against the fall-off prevention portion 343 before falling out of the first insertion hole 321. This prevents the power feed terminal 120 from falling out of the first insertion hole 321. Furthermore, the large diameter portion 122 of the power feed terminal 120 needs to move downward (against gravity) to pass through the fall-off prevention portion 343. Therefore, it is difficult for the large diameter portion 122 of the power feed terminal 120 to reach the first insertion hole 320 due to external factors such as vibration alone, and the power feed terminal 120 is unlikely to fall out of the power feed socket 300.

[0046] (1.6) Action and Effect Next, the effects of the power supply socket 300 configured as above will be described.

[0047] The power feed socket 300 according to the embodiment includes a first insertion portion 320 having a first insertion hole 321 into which the power feed terminal 120 of the light source unit 10 is inserted, a conductive portion 330 electrically connected to the power feed terminal 120, and a guide portion 340 that guides the power feed terminal 120 during the connection work. The guide portion 340 is connected to the first insertion hole 321 and has a guide hole 341 that guides the power feed terminal 120 from the first insertion portion 320 to the conductive portion 330, and a detachment prevention portion 343 that prevents the power feed terminal 120 from detaching. The detachment prevention portion 343 is provided between the first insertion hole 321 and the conductive portion 330 in the movement direction, which is the direction in which the power feed terminal 120 moves during the connection work.

[0048] According to the above configuration, by providing the fall-off prevention portion 343, the large diameter portion 122 of the power supply terminal 120 comes into contact with the fall-off prevention portion 343 before falling out of the first insertion hole 321. Therefore, the power supply terminal 120 does not fall out of the first insertion hole 321, and by moving the large diameter portion 122 of the power supply terminal 120 to a position where it is electrically connected to the conductive portion 330, the electrical connection between the power supply terminal 120 and the conductive portion 330 can be improved.

[0049] In the power feeding socket 300, the guide portion 340 has a retaining portion 344 provided between the fall-off prevention portion 343 and the conductive portion 330 in the movement direction. The fall-off prevention portion 343 is formed so as to have a step between the first insertion hole 321 and the retaining portion 344.

[0050] According to the above configuration, when the large diameter portion 122 of the power supply terminal 120 is positioned in the retaining portion 344, the large diameter portion 122 of the power supply terminal 120 comes into contact with the fall-off prevention portion 343 before falling out of the first insertion hole 321. As a result, the power supply terminal 120 can be prevented from falling out of the first insertion hole 321. Furthermore, because the retaining portion 344 is located lower than the fall-off prevention portion 343, the large diameter portion 122 of the power supply terminal 120 must move vertically downward (against gravity) to pass through the fall-off prevention portion 343. This makes it difficult for the large diameter portion 122 of the power supply terminal 120 to reach the first insertion portion 320 due to external factors such as vibration alone, and the power supply terminal is unlikely to fall out of the power supply socket 300.

[0051] In the power supply socket 300, the fall-off prevention portion 343 includes a wall 3431 that is provided along the insertion direction so as to surround the first insertion hole 321.

[0052] According to the above configuration, the first insertion portion 320 having the first insertion hole 321 and the fall-off prevention portion 343 can be formed integrally, which results in a reduction in the number of parts.

[0053] The guide hole 341 has an arc shape that follows the movement direction in which the power supply terminal 120 moves during the connection work. An opening length L2 of the guide hole 341 in the intersecting direction that intersects with the movement direction is shorter than an opening length L1 of the first insertion hole 321 in the intersecting direction.

[0054] According to the above configuration, by rotating the light source unit 10, the power supply terminal 120 can be inserted into the guide hole 341. Furthermore, since the diameter D2 of the large diameter portion 122 of the power supply terminal 120 is smaller than the opening length L1 of the first insertion hole 321 and larger than the opening length L2 of the guide hole 341, there is an advantage that the power supply terminal 120 is less likely to fall out of the guide hole 341.

[0055] (1.7) Variations The configuration of the present disclosure has been described above based on the embodiments, but the present disclosure is not limited to the above embodiments. Furthermore, the materials, values, etc. described in the above embodiments are preferred examples and are not intended to be limiting. Furthermore, the configuration of the power supply socket 300 can be modified as appropriate without departing from the scope of the technical concept of the present disclosure.

[0056] (1.7.1) Variation 1 A first modified example of the power feeding socket 300 according to the embodiment of the present disclosure will be described below with reference to FIG. 7. FIG. 7 is a cross-sectional view of the power feeding socket 300 in the lighting device 1 according to the first modified example. The basic configuration of the power feeding socket 300 according to the first modified example is the same as that of the above-described embodiment. The difference is the configuration of the fall-off prevention unit 343. In the first modified example, a description of the same configuration as the above-described embodiment will be omitted, and the description will focus on the differences.

[0057] 7, the fall-off prevention portion 343 has a protrusion 3432. The protrusion 3432 is provided at the tip (upper end) of the wall 3431 in the insertion direction. That is, the fall-off prevention portion 343 has the protrusion 3432 at the tip of the wall 3431 on the conductive portion 330 side. Here, the protrusion 3432 is provided so that the angle θ1 formed between the protruding direction, in which the protrusion 3432 protrudes, and the insertion direction is an acute angle. The insertion direction is the direction in which the power supply terminal 120 is inserted into the first insertion hole 321, and is the up-and-down direction in the first modification.

[0058] In the power feed socket 300 according to the first modification, when the large diameter portion 122 of the power feed terminal 120 passes through the fall-off prevention portion 343, the protrusion 3432 provided on the fall-off prevention portion 343 increases the movement distance of the large diameter portion 122 in the insertion direction. Therefore, the protrusion 3432 makes it difficult for the large diameter portion 122 of the power feed terminal 120 to pass through the fall-off prevention portion 343, so the power feed terminal 120 is less likely to fall out of the first insertion hole 321, and it is possible to prevent the light source unit 10 from falling out of the power feed socket 300.

[0059] Furthermore, in the power supply socket 300 according to variant example 1, when the large diameter portion 122 of the power supply socket 300 moves in the insertion direction from a state in which it is in contact with the fall-off prevention portion 343, the large diameter portion 122 gets caught on the protrusion portion 3432, making it difficult for the power supply terminal 120 to fall off from the first insertion hole 321.

[0060] (1.7.2) Variation 2 A second modified example of the power feed socket 300 according to the embodiment of the present disclosure will be described below with reference to FIG. 8. FIG. 8 is a cross-sectional view of the power feed socket 300 in the lighting device 1 according to the second modified example. The basic configuration of the power feed socket 300 according to the second modified example is the same as that of the above-described embodiment. The difference is the configuration of the fall-off prevention unit 343. In the second modified example, a description of the same configuration as the above-described embodiment will be omitted, and the description will focus on the differences.

[0061] 8, the fall-off prevention portion 343 has an inclined surface 3433. The inclined surface 3433 is inclined so as to approach the conductive portion 330 in the insertion direction, which is the direction in which the power supply terminal 120 is inserted into the first insertion hole 321, with increasing distance from the retaining portion 344. Specifically, the inclined surface 3433 is an upward inclined surface from the retaining portion 344 toward the first insertion hole 321.

[0062] In the power feed socket 300 according to the second modification, when the large diameter portion 122 of the power feed terminal 120 inserted into the socket body 310 through the first insertion hole 321 is guided toward the conductive portion 330, the large diameter portion 122 can be guided toward the conductive portion 330 along the inclined surface 3433 of the fall-off prevention portion 343. This has the advantage of improving the attachability when attaching the light source unit 10 to the power feed socket 300. Furthermore, in order for the power feed terminal 120 to fall out of the first insertion hole 321, the large diameter portion 122 must move along the upward inclined surface 3433, which has the advantage of making it less likely for the power feed terminal 120 to fall out of the first insertion hole 321.

[0063] (1.7.3) Other variations Other modifications may be made to the configuration of the lighting device 1 as appropriate without departing from the scope of the technical concept of the present disclosure. Fig. 9 is a cross-sectional view of a power feed socket 300 in a lighting device 1 according to another modification. As shown in Fig. 9, the conductive portion 330 may be configured to feed power by contacting the large diameter portion 122 of the power feed terminal 120 from the radial direction of the socket body 310.

[0064] Furthermore, bent portion 331 of conductive portion 330 is V-shaped and is in line contact with large diameter portion 122, but bent portion 331 may be convex and in surface contact with large diameter portion 122. This reduces poor conduction between conductive portion 330 and large diameter portion 122 and also improves the holding force of conductive portion 330 to large diameter portion 122.

[0065] (Aspect) The power feed socket (300) according to the first aspect is a power feed socket (300) that feeds power to a light source unit (10) that includes a power feed terminal (120). The power feed socket (300) includes an insertion portion (320), a conductive portion (330), and a guide portion (340). The insertion portion (320) has an insertion hole (321) into which the power feed terminal (120) is inserted. The conductive portion (330) is electrically connected to the power feed terminal (120). The guide portion (340) guides the power feed terminal (120) during the connection process for electrically connecting the power feed terminal (120) to the conductive portion (330). The guide portion (340) has a guide hole (341) and a fall-off prevention portion (343). The guide hole 341 is connected to the insertion hole 321 and guides the power supply terminal 120 from the insertion portion 320 to the conductive portion 330. The fall-off prevention portion 343 prevents the power supply terminal 120 from falling off. The fall-off prevention portion 343 is provided between the insertion hole 321 and the conductive portion 330 in the movement direction of the power supply terminal 120 during the connection work.

[0066] According to the power feed socket (300) of the above aspect, the provision of the fall prevention portion (343) causes the power feed terminal (120) to come into contact with the fall prevention portion (343) before falling out of the insertion hole (321). Therefore, by moving the power feed terminal (120) from a state in which the power feed terminal (120) is in contact with the fall prevention portion (343) to a position where the power feed terminal (120) is electrically connected to the conductive portion (330), the electrical connection between the power feed terminal (120) and the conductive portion (330) can be improved.

[0067] In the power socket (300) according to the second aspect, the guide portion (340) of the first aspect further includes a retaining portion (344) provided between the fall-off prevention portion (343) and the conductive portion (330) in the movement direction. The fall-off prevention portion (343) is formed so as to have a step between the insertion hole (321) and the retaining portion (344).

[0068] According to the power feed socket (300) of the above aspect, when the power feed terminal (120) is positioned in the retaining portion (344), the power feed terminal (120) abuts against the fall-off prevention portion (343) before falling out of the insertion hole (321). This prevents the power feed terminal (120) from falling out of the insertion hole (321). Furthermore, the retaining portion (344) is located lower than the fall-off prevention portion (343). Therefore, in order for the power feed terminal (120) to pass through the fall-off prevention portion (343), the power feed terminal (120) must move vertically downward (against gravity). This makes it difficult for the power feed terminal (120) to reach the insertion portion (320) due to external factors such as vibration alone, and the power feed terminal (120) is less likely to fall out of the power feed socket (300).

[0069] In the power supply socket (300) according to the third aspect, in the second aspect, the fall-off prevention portion (343) includes a wall (3431) that surrounds the insertion hole (321) and is provided along the insertion direction, which is the direction in which the power supply terminal (120) is inserted into the insertion hole (321).

[0070] According to the power supply socket (300) of the above aspect, the insertion portion (320) having the insertion hole (321) and the fall-off prevention portion (343) can be integrally formed, which leads to a reduction in the number of parts.

[0071] In the power supply socket (300) according to the fourth aspect, the fall-off prevention portion (343) of the third aspect has a protrusion (3432) at the tip of the wall (3431) in the insertion direction.

[0072] In the power feed socket (300) according to the above aspect, when the power feed terminal (120) passes through the fall prevention portion (343), the movement distance of the power feed terminal (120) in the insertion direction is increased by providing the protrusion (3432) on the fall prevention portion (343). In this case, the protrusion (3432) makes it difficult for the power feed terminal (120) to pass through the fall prevention portion (343), and therefore the power feed terminal (120) is less likely to fall out of the insertion hole (321), and this makes it possible to prevent the light source unit (10) from falling out of the power feed socket (300).

[0073] In the power feed socket (300) according to the fifth aspect, the angle (θ1) formed between the protruding direction of the protrusion (3432) and the insertion direction in the fourth aspect is an acute angle.

[0074] According to the power supply socket (300) of the above aspect, when the power supply terminal (120) moves in the insertion direction from a state in which it is in contact with the fall-off prevention portion (343), the power supply terminal (120) gets caught on the protrusion portion (3432), and therefore the power supply terminal (120) is less likely to fall off from the insertion hole (321).

[0075] In the power feed socket (300) according to a sixth aspect, in any one of the first to fifth aspects, the guide hole (341) has an arc shape along the movement direction. An opening length (L2) of the guide hole (341) in a cross direction that intersects with the movement direction is shorter than an opening length (L1) of the insertion hole (321) in the cross direction.

[0076] According to the power feed socket (300) of the above aspect, the power feed terminal (120) can be inserted into the guide hole (341) by rotating the light source unit (10). In addition, the diameter (D2) of the large diameter portion (122) of the power feed terminal (120) is smaller than the opening length (L1) of the insertion hole (321) and larger than the opening length (L2) of the guide hole (341), which is advantageous in that the power feed terminal (120) is less likely to fall out of the guide hole (341).

[0077] The lighting device (1) according to a seventh aspect includes the power feed socket (300) according to any one of the first to sixth aspects, and a light source unit (10) detachably attached to the power feed socket (300).

[0078] The lighting device (1) according to the above aspect includes the power supply socket (300), which improves the electrical connection between the power supply terminal (120) and the conductive portion (330). [Explanation of symbols]

[0079] 1. Lighting equipment 10 Light source unit 120 Power supply terminal 300 power socket 320 First insertion part (insertion part) 321 First insertion hole (insertion hole) 330 Conductive part 340 Guide part 341 Guide hole 343 Fall-off control section 344 Retention part 3431 Wall 3432 Protrusion L1, L2 opening length θ1 angle

Claims

1. A power supply socket for supplying power to a light source unit having a power supply terminal, an insertion portion having an insertion hole into which the power supply terminal is inserted; a conductive portion electrically connected to the power supply terminal; a guide portion that guides the power supply terminal during a connection operation for electrically connecting the power supply terminal to the conductive portion, The guide portion is a guide hole connected to the insertion hole and guiding the power supply terminal from the insertion portion to the conductive portion; a fall-off prevention portion that prevents the power supply terminal from falling off, the fall-off prevention portion is provided between the insertion hole and the conductive portion in a movement direction in which the power supply terminal moves during the connection work. Power supply socket.

2. the guide portion further includes a retaining portion provided between the fall-off restricting portion and the conductive portion in the movement direction, The fall-off prevention portion is formed so as to have a step between the insertion hole and the retention portion. The power supply socket according to claim 1.

3. the fall-off prevention portion includes a wall provided along an insertion direction, which is a direction in which the power supply terminal is inserted into the insertion hole, so as to surround the insertion hole, The power supply socket according to claim 2.

4. The fall-off prevention portion has a protrusion at a tip of the wall in the insertion direction. The power supply socket according to claim 3.

5. The angle formed between the protruding direction of the protrusion and the insertion direction is an acute angle. The power supply socket according to claim 4.

6. the guide hole has an arc shape along the movement direction, an opening length of the guide hole in a cross direction crossing the movement direction is shorter than an opening length of the insertion hole in the cross direction; The power supply socket according to any one of claims 1 to 5.

7. The power supply socket according to any one of claims 1 to 5, The light source unit is detachably attached to the power supply socket. Lighting equipment.

Images